Nature Climate Change · 24 August 2026 · From issue 26
Climate warming drives thermal shocks and accelerated freshwater habitat fragmentation
About 63% of river fish will face more lasting heat barriers under high pollution levels.
Hong Wang, Junguo Liu et al.
Warming rivers and lakes are not just getting hotter slowly. They are creating sudden temperature spikes that can trap fish in shrinking pockets of livable water. A study of 9,809 freshwater fish species found that many will face worsening heat barriers that cut off populations from each other, raising the risk of local extinctions.
the share of river fish species expected to face more persistent heat barriers under a high-emissions scenario
Model based projection across 9,809 species, not direct field data.
Integrity screen: passed (3 checks) Checked 25 August 2026. Retraction record: none. DOI resolves at doi.org. Metadata record found (Nature Climate Change). Read the source
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